Geometry and Discrete Mathematics notes? Resources?

Hello everyone, i'm going to take Geometry and Discrete Mathematics, next year in high school (grade 12). So this summer i'm planning to read some books that would help me out next year, to bulit up my basic skills. So anyone know any sites or books that would help me out somehow?

I took logic concurrently with discrete math and that worked really well. The proofs in symbolic logic help you get used to the discrete math proofs. They help give you a feeling that you really do know what's going on. Depending on your course, you'll probably do some logic actually in the discrete math course too.

http://people.hofstra.edu/faculty/Stefan_Waner/RealWorld/logic/logicintro.html [Broken] looks like a pretty good resource for introductory logic.

http://home.earthlink.net/~lfdean/carroll/puzzles/logic.html [Broken] has a lot of problems that can be solved by thinking them through, but using symbolic logic makes them easier.

http://www.public.coe.edu/~pmccormi/phl115/s02/exercises.html [Broken]
has a bunch of problems. For symbolic logic (you may want to skip the aristotelian stuff) you should scroll down to the links labeled Natural Deduction Exercises and the exercises below them.